External relationships
Kaufman (1994: 64) groups Leco and Sechura–Catacao together as part of a proposed ''Macro-Lecoan'' family.Kaufman, Terrence. 1994. The native languages of South America. In: Christopher Moseley and R. E. Asher (eds.), ''Atlas of the World’s Languages'', 59–93. London: Routledge. Tovar (1961), partly based on Schmidt (1926), classifies Sechura–Catacao together with theVocabulary
Loukotka (1968) lists the following basic vocabulary items. : Comparative word list of Sechura, Colan, and Catacao from Loukotka (1949): ;Notes *(Sp.) = Spanish loanword (excluded) ;Sources used by Loukotka (1949) *''Sechura'': Buchwald (1919)Buchwald, Otto von. 1919. Migraciones sudamericanas. ''Boletín de la sociedad ecuatoriana de estudios historicos'', vol 1, pp. 227-239. Quito. *Manuscript by Martínez Compañón from the 1700s :References
* {{DEFAULTSORT:Sechura-Catacao languages Proposed language families Indigenous languages of the Americas